Opera randomly offers a "year of free Netflix"?

I haven't found this topic anywhere. I was just browsing with Opera (version 55.0.2994.44), when suddenly a tab opened offering a year of free Netflix. It said that Opera offers this to random users once in a while, and asked to complete a small survey about the browser in return. The questions were something like How satisfied are you with it, What's the thing you like most about it (Speed, Privacy, Service) and How likely would you recommend it to someone else.

It also seemed written in fairly good English, and didn't really ask for personal information, but still, kinda shady. Anybody else experienced this?